[Important] Temporary Unavailability of keio.jp Phone Authentication (Voice/SMS) (July 22, 18:00–22:00 JST)

Emergency maintenance for keio.jp phone authentication (Voice/SMS) is scheduled for the following period. During this time, phone authentication (Voice/SMS) will be unavailable.

If you plan to use services requiring keio.jp sign-in during this period, please take one of the following actions in advance.
(*Users using authentication methods other than phone can use them as usual.)

Requests for Advance Action

• Sign in to the services you plan to use before the maintenance starts.

  (Since re-authentication may be required depending on the app or your environment, action "2" below is recommended.)

• Register and use an authentication method other than phone (Voice/SMS). (Recommended)

  Reference: keio.jp Multi-Factor Authentication Setting Manual (Additional Settings)

[Important] Future Handling of Phone Authentication

Regarding phone (Voice/SMS) authentication, there is a trend toward discouraging its use for security reasons, and keio.jp also plans to phase it out and eventually discontinue it. Please also check the following announcement.

[Important] Reviewing the use of phone authentication (SMS/Voice) in keio.jp MFA and request for migration to Passkeys, etc.
・For Students (Regular Degree Students)
・For Faculty and Staff